highaltitude.log.20110809

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[00:03] <natrium42> i got the funniest email ever today
[00:15] <natrium42> SpeedEvil: you there?
[00:29] <natrium42> http://pastie.org/pastes/2342255/text?key=t2t5hafgqttlva1gc8vzjw
[00:29] Action: natrium42 died laughing
[00:40] <SpeedEvil> yes
[00:40] <SpeedEvil> ahahhahahahahhahahhahhhah
[00:42] <hibby> lol
[00:43] <SpeedEvil> I actually did a design for a simple lens system to fix global warming.
[00:43] <SpeedEvil> A bit sunwards of the lagrange point.
[00:43] <SpeedEvil> Couple of large lenses, array of shutters, job done.
[00:44] <SpeedEvil> As a plus, you can sell advertising space on the sun.
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[04:23] <SamSilver> Morning Dan-K2VOL
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[07:52] <jcoxon> morning all
[07:53] <daveake_> mornin'
[07:54] Action: jcoxon is horrified by all this rioting
[07:54] <jcoxon> though no idea what the solution is
[07:55] <daveake_> Army w/ guns + curfew, I guess
[07:55] <jcoxon> i guess we need zeplins
[07:55] <jcoxon> they solve most problems
[07:55] <jcoxon> (keeping on topic :-p )
[07:55] <daveake_> :)
[07:55] <daveake_> Been meaning to ask ... did the Atlas project with two balloons ever happen?
[07:56] <jcoxon> the high alt attempt?
[07:56] <daveake_> yep
[07:56] <jcoxon> no
[07:56] <daveake_> Shame. Any reason? Is it going to happen?
[07:57] <jcoxon> the current thinking is that 2 balloons won't work
[07:57] <jcoxon> if the contact they often weaken each other
[07:57] <jcoxon> and therefore make it a poor option for high alt
[07:58] <daveake_> I was wondering about that. Even with different line lengths you're going to have balloon rubbing against nylon cord
[07:58] <fsphil> even if they didn't weaken eachother, you'd likely end up with two floating balloons at 36km
[07:58] <daveake_> That seems to be common from what people were saying yesterday :(
[07:58] <fsphil> have any latex balloons gotten higher?
[07:59] <jcoxon> http://www.swharden.com/blog/2011-08-05-i-before-e-except-after-hellschreiber/
[08:00] <fsphil> was reading that yesterday, but only quickly. am I right in thinking he's using PWM to generate the RF signal?
[08:00] <jcoxon> yeah
[08:00] <fsphil> ooch
[08:01] <jcoxon> passing it through a crystal osc
[08:01] <jcoxon> to produce AM
[08:01] <fsphil> you should post something about your own beacon
[08:01] <fsphil> aaah
[08:01] <fsphil> gotcha .. so the pwm is just for the base-band signal
[08:01] <jcoxon> i could add a comment i guess
[08:02] <fsphil> had visions of RF leaking everywhere. I tried that with rtty .. had the pwm output at about 500khz. could still receive it at 30mhz
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[08:07] <Darkside> lol
[08:07] <Darkside> jcoxon: i could probably use that code with my HF transmitter and do it a bit cleaner
[08:07] <Darkside> i still need to work on pulse shaping though
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[08:11] <number10> fsphil: is this correct from your hadie info - (3.3v ’ 330 ohm ’ NTX2 tx pin  2.2k ohm  rtty output pin)
[08:12] <fsphil> yes, though I found a better combination
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[08:12] <m1x10> hi all
[08:12] <fsphil> 2.2k ohm on the 3.3v side
[08:12] <fsphil> and 22k ohm on the rtty pin
[08:12] <fsphil> seems to make a perfect 350hz shift
[08:12] <fsphil> morning m1x10
[08:13] <m1x10> morning. still need that pics?
[08:13] <fsphil> just a couple if it's no bother - I need to see what kind of headers the linksprite sends with the images
[08:13] <fsphil> I've one here but haven't wired it up yet :)
[08:13] <m1x10> yeah
[08:13] <m1x10> give me your mail
[08:14] <number10> is the imput impedance of the ntx2 is effectively 100k - I need to recaulculate as I got quite hive input voltages with my fag packet calcs this morning... cheers fsphil
[08:14] <number10> high !hive
[08:16] <fsphil> with the three resistors it's tricky to calculate what's going on
[08:20] <number10> i just assumed that for mark, on your new values we would have 100k/(22k || 2k2 +100k) X 3v3 and for space (22k || 100k) / ((22k || 100k) +2k2) *3.3v - Ill get another fag packet ;)
[08:22] <Darkside> oh yeah, i had a go at keying the NTX2 using just one pin
[08:22] <Darkside> it didn't work very well
[08:22] <Darkside> i think the NTX2s TXD pin has a reasonably high input capacitance or something
[08:23] <Darkside> or just going from 0 to 0.5v (or whatever it was i was doing) doesn't work that well
[08:23] <number10> interesting Darkside
[08:24] <Darkside> if you have the bias point sitting around 1v or so, like what we do normally, it works fine
[08:24] <Darkside> or is it more? i forget now
[08:24] <Darkside> juxta uses a 47k and a 39k resistor
[08:24] <Darkside> using 2 pins on the AVR
[08:25] <Darkside> ok i'd better head into work
[08:25] <fsphil> the 2.2 and 22k worked well for me at 50 and 300 baud
[08:26] <number10> cheers
[08:27] <fsphil> the smaller values worked too but where very sensitive, a small change in resistance made a big change in shift
[08:27] <number10> I did tru Upus turtorial with a 5v system last night and was slightly hight than 1.2v with a latger shift - I think I should check wiring again and experiment a bit - thanks for info guys!
[08:29] <number10> boy my typing is terrible (tru==try) (hight == high)
[08:30] <fsphil> my eyesight must be bad too, I never noticed :)
[08:30] <number10> lol
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[08:43] <Elwell> http://ukhas.org.uk/guides:linkingarduinotontx2 <-- that still up to date? looks dead easy :-)
[08:45] <edmoore> Elwell: sure
[08:52] <daveake_> I used 3 Rs and 1 o/p pin. Maths was ko, and it all worked fine.
[09:16] <fsphil> it was a great idea, to do the fsk like this
[09:19] <fsphil> cool, m1x10 the linksprite has less subsampling than the c328 - potentially better image quality, though incompatible with all my code :)
[09:20] <daveake_> jcoxon: with rioters as stupid as this - http://www.youtube.com/watch?v=p39ULW_xzUE&feature=player_embedded - there are no problems lol
[09:21] <fsphil> lol
[09:22] <daveake_> Maybe I should use a Heineken umbrella instead of a 'chute ...
[09:22] <fsphil> the whole thing is stupid
[09:22] <daveake_> indeed
[09:22] <fsphil> think it's just luck nobody has been killed so far
[09:25] <number10> yes - I think police will be encouraged to be more forceful soon
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[10:10] <m1x10> fsphil, cool
[10:10] <m1x10> :)
[10:11] <m1x10> I need to leave now.
[10:11] <m1x10> bye all
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[10:45] <cuddykid> with all these riots - a floater would give a nice aerial downlink! - though not at 30km up!
[10:49] <cuddykid> think I'm going to use 1 of my solar panels to provide the power for nichrome cutdown
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[10:59] <jcoxon> back
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[11:10] <cuddykid> daveake_: new keychain cam has arrived!
[11:11] <cuddykid> is it possible to send me that flickr image with connectors that need to be shorted? - heading out now, will do it when I get back :) thanks!
[11:11] <daveake_> Are we taking bets on time to destruction? ;)
[11:13] <daveake_> cuddykid http://www.flickr.com/photos/daveake/6008694764/
[11:16] <Darkside> fellow student told me to eat a wham bar
[11:16] <Darkside> MY JAW IS STUCK
[11:17] <fsphil> *wham*
[11:18] <fsphil> good though!
[11:21] <Darkside> lol
[11:22] <jcoxon> fsphil, i added a comment
[11:22] <jcoxon> invited that guy on here
[11:25] <fsphil> good thinking, just noticed they're doing this for a hab launch
[11:33] <jcoxon> eek my soldering iron seems to have died
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[11:35] <NigeyS> wow
[11:36] <NigeyS> never have i felt so ashamed to be british
[11:36] <NigeyS> sad days
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[11:43] <jcoxon> indeed not pleasent
[11:44] <GW8RAK> Just been speaking to a doctor involved in long term human spaceflight research. He's off to Antarctica for a really isolated time.
[11:44] <Darkside> ooh
[11:45] <GW8RAK> Zero outside support.
[11:45] <Randomskk> solo?
[11:45] <GW8RAK> Mean summer temperature -30C
[11:45] <Darkside> outside monitoring though?
[11:45] <GW8RAK> No, there's about 12-14 in the dome crew
[11:46] <GW8RAK> Other projects will be outside Darkside.
[11:47] <GW8RAK> Photo of weather balloon on base website
[11:47] <NigeyS> jcoxon, understatement, and police have confirmed the 1st fatality, getting serious now :(
[11:47] <Darkside> GW8RAK: i mean, will they be monitored
[11:47] <Darkside> to ensure people dont go visit in a year and find 12-14 bodies
[11:48] <GW8RAK> They are not there to be isolated, i.e. lock in a gold fish bowl while people look in, but as a research station. The attraction is that at high altitude and low air pressure, the physiological effects will be, dare I say it, Martian.
[11:49] <GW8RAK> 645hPa
[11:49] <GW8RAK> I wonder about a one way HAB load for him to take down.
[11:49] <codetiger> @GW8RAK I just logged in. Are you guys speaking about, someone flew on a balloon to nearspace?
[11:50] <GW8RAK> No sorry, just a doctor acquaintance off to do research for ESA in Antarctica
[11:50] <codetiger> :)
[11:51] <GW8RAK> Seems like the Martian missions are getting funding, so they must be serious
[11:52] <codetiger> meanwhile, am working on parachutes now. I am ordering Balloons from Hwoyee this week. But decided to do a chute myself to keep the cost under control.
[11:52] <codetiger> is the chute material available eaily in any other form?
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[11:53] <codetiger> I mean Rip-stop Nylon
[11:53] <fsphil> you could use an umbrella from a london pub
[11:54] <fsphil> what size of chute are you making?
[11:55] <codetiger> 4ft
[11:55] <GW8RAK> Temperatures around -70 at present. That's cold
[11:55] <fsphil> I'd love to see that GW8RAK
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[11:56] <GW8RAK> I'm waiting for one of my customers to pay for me to go down there, but I doubt it will happen.
[11:56] <GW8RAK> http://translate.google.com/translate?client=tmpg&hl=en&langpair=it|en&twu=1&u=http://www.concordiabase.eu/
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[12:21] <GW8RAK> Anybody ever been to surplus military equipment auction? Loads of test gear coming up at one.
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[12:25] <edmoore> aeroconn systems does mil surplus chutes
[12:25] <cuddykid> thanks daveake_ ! Yes, will probably be minutes to destruction!!
[12:25] <daveake_> :)
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[12:30] <fsphil> haha: http://www.flickr.com/photos/pixel-eight/6024429000/
[12:30] <Laurenceb_> lol
[12:31] <GW8RAK> All's right with the world, we've got a nice cuppa.
[12:35] <cuddykid> haha
[12:36] <cuddykid> oh no!!! - the insides of this cam are different, despite looking exactly the same on outside lol
[12:37] <cuddykid> daveake_: ^ :( lol
[12:40] <daveake_> The odds are shortening :)
[12:41] <cuddykid> lol
[12:42] <cuddykid> i'll upload photos of the internals - in fact now I've completely dissembled it, it does look easier to solder lol!
[12:43] <number10> was the case easily dissambled cuddykid?
[12:43] <cuddykid> yeah, same as the last one - just requires 4 small screws to be undone :)
[12:49] <cuddykid> wooo daveake_ looks like it's the same pins on buttons to be shorted :)
[12:54] <cuddykid> hmm.. flickr is refusing to load the login page
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[12:54] <edmoore> flickr has been v slow for me usually
[12:54] <edmoore> lately*
[12:55] <fsphil> not too bad here
[12:55] <jcoxon> same
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[13:01] <edmoore> jcoxon: same as me or fsphil ?
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[13:02] <NigeyS> ello ed
[13:02] <edmoore> yo NigeyS
[13:02] <edmoore> how are things?
[13:03] <NigeyS> pretty good, working on ats-1 payload box, and wondering which evil person invented sma connectors! lol you?
[13:03] <Zuph> Anyone know any quick back-of-envelope methods for modeling the resistance of a plasma channel (such as in a spark gap)? (To lazy to googlle extensively this morning)
[13:03] <edmoore> Zuph: no
[13:03] <edmoore> NigeyS: ats-1?
[13:03] <edmoore> and yes to SMA
[13:04] <NigeyS> yeah, ATS is my main hab project, with picochu being the foil project
[13:04] <edmoore> there have been a few instances where it's been 4 in the morning, putting together a payload that for some stupid reason is due to launch in 6 hours
[13:04] <edmoore> and i am blearey-eyed struggling with an sma
[13:04] <edmoore> looking all around the desk for the bloody sma central probe
[13:04] <Zuph> Not as bad as mmcx :-p
[13:04] <NigeyS> haha yup, know that feeling all to well!
[13:04] <edmoore> only to find that it is embedded several mm into my thumb
[13:04] <NigeyS> lol!
[13:05] <NigeyS> Zuph, theyre worse? :o
[13:05] <edmoore> they're really minature
[13:05] <edmoore> but they click satisfyingly
[13:05] <fsphil> SMA ain't too bad
[13:05] <NigeyS> ohh
[13:05] <fsphil> PL-259 is worse
[13:05] <edmoore> i prefer them but usually use sma for ease of construction
[13:05] <Zuph> And they unclick stealthfully.
[13:05] <NigeyS> fsphil, im 32, have failing eyesight, theyre evil! lol
[13:05] <edmoore> fsphil: a bakeras blowtorch
[13:05] <edmoore> backers*
[13:05] <edmoore> gah
[13:06] <edmoore> bakers*
[13:06] <NigeyS> you got there in the end Ed :p
[13:06] <edmoore> i usually do
[13:06] <edmoore> better late than never
[13:06] <NigeyS> haha yup!
[13:06] <edmoore> so what's fl;ying on ats-1?
[13:07] <Darkside> a fucking N connector
[13:07] <Darkside> lol
[13:07] <NigeyS> sensors only, its pretty much a test of my hardware and code, and i think darkside is sending mini-nut along for a nice freeze test
[13:07] <Darkside> NigeyS: srsly, build the antenna into your payload container, and run a cable from it to your pcb
[13:07] <NigeyS> Darkside, its been ditched!
[13:07] <Darkside> good!
[13:07] <fsphil> N is too big for hab'ing
[13:07] <Darkside> there goes about 15 grams lol
[13:07] <NigeyS> gonna sma a shagi to the pcb :)
[13:07] <NigeyS> 15? hah try 112grams!
[13:07] <Laurenceb_> uFL ftw
[13:08] <fsphil> there's a sentence that's been waiting to be said for a long time
[13:08] <Darkside> Laurenceb_: lol
[13:08] <Darkside> but yeah eroomde, i'm duct taping mininut to the side n an attempt to kill it
[13:08] <Darkside> i wanna see if it breaks at -50 deg C
[13:08] <NigeyS> i hope it doesnt die!
[13:08] <Darkside> if it does, meh
[13:08] <Darkside> i have 7 more boards back in adelaide
[13:08] <NigeyS> lol
[13:09] <edmoore> Darkside: awesome
[13:09] <edmoore> ]everything rated to -40?
[13:09] <NigeyS> we do have a slight problem though Darkside
[13:09] <Darkside> speaking of which i need to get anothe rbattery holder
[13:09] <fsphil> you're leaving it on the outside?
[13:09] <Darkside> edmoore: yeah
[13:09] <edmoore> cool
[13:09] <Darkside> fsphil: yep, in a smapp bag
[13:09] <Darkside> small*
[13:09] <NigeyS> we're both using .650 :|
[13:09] <edmoore> she'll be fine then
[13:09] <Darkside> NigeyS: hmm
[13:09] <Darkside> coudn't get any 0.75?
[13:09] <Darkside> .075*
[13:09] <fsphil> excellent!
[13:09] <NigeyS> nope, could only get a 650, not long spoke to radiometrix about it
[13:10] <Darkside> i might see if RFMA can courier me a .075
[13:10] <NigeyS> unless anyone has a .75 handy and wants to swap ?
[13:10] <fsphil> I'll swap you an 075 for an 650
[13:10] <NigeyS> schweet!
[13:10] <Darkside> fsphil: mail it *Today*
[13:11] <Darkside> else it won't get here in time
[13:11] <fsphil> I can't post it until tomorrow, should be there Thursday
[13:11] <NigeyS> aye it will, oddly enough post from N.I gets to me faster than post from london etc
[13:11] <Darkside> other option is to try and de-tune one of the 650s
[13:11] <fsphil> yea, bias them in different directions
[13:11] <Darkside> problem is mine sill drift way more
[13:11] <fsphil> though with yours on the outside, it's gonna go nuts :)
[13:11] <edmoore> lol
[13:11] <Darkside> as mine will easilt get to -30 or so
[13:12] <Darkside> yep
[13:12] <NigeyS> haha its gonna go completely mental
[13:12] <fsphil> this will be an excellent test
[13:12] <Darkside> i want to use the FCD to measure data from mine
[13:12] <Darkside> and ideally record the entire 80KHz of spectrum
[13:12] <edmoore> i remember once when jcoxon flew a morse beacon with a different radio unit in addition to a normal flight computer
[13:12] <edmoore> the morse becon was all voer the place
[13:12] <fsphil> if I get up to the local big hill, I will use the funcube dongle on one yagi and the 817 on the other
[13:12] <Darkside> yep
[13:12] <Darkside> so we'll have MiniNut on 434.650, and ATS-1 on 434.075
[13:12] <Darkside> yay!
[13:13] <Darkside> and the official story is that MiniNut is broadcasting 10mW
[13:13] <edmoore> 'COOOMIIING THROOOOOUGH DAAAH DIT DAAAAH' smashing into the rtty
[13:13] <Darkside> as i'm 'undervolting' the transmitter
[13:13] <Darkside> >_>
[13:13] <NigeyS> lol ed
[13:14] <NigeyS> Laurenceb
[13:14] <NigeyS> http://www.theregister.co.uk/2011/08/09/lohan_launch_concepts/
[13:14] <NigeyS> lols!
[13:14] <edmoore> 'OH HAI. I CHANGED MY MIND GOING BACK THROUGH YOU AGAIN DEEEEEEEEEEEEEEEEEEEEEEE!!!'
[13:14] <edmoore> jcoxon: WHAT UNIT WAS THAT?
[13:14] <edmoore> whoops
[13:14] <jcoxon> edmoore, good memories
[13:14] <NigeyS> lol, i should add a c/w beacon now just to annoy everyone :p
[13:14] <Zuph> haha
[13:14] <Zuph> Homebrew radio?
[13:14] <jcoxon> depends which flight
[13:14] <jcoxon> it was an exposed ntx2 most recently
[13:15] <edmoore> we had a pint and it was late
[13:15] <edmoore> with the tracking station
[13:15] <edmoore> actually that's most of the ballasy halo flights
[13:15] <jcoxon> again that sounds like most flights!
[13:15] <jcoxon> no more pints
[13:15] <jcoxon> no more going for food
[13:15] <jcoxon> ends badly
[13:15] <jcoxon> the time we didn't go and had pizza delivered it flew all night
[13:15] <cuddykid> daveake_: http://flic.kr/p/abqpcn & http://flic.kr/p/abteuA
[13:15] <edmoore> oh yes
[13:16] <edmoore> i'm sure we had a drink tho
[13:16] <jcoxon> yeah we did
[13:17] <Darkside> so what chase vehicles will we have for the ATS-1 flight?
[13:18] <jcoxon> i'd launch a pico payload this weekend
[13:18] <jcoxon> if the predictions weren't so ridicolous
[13:18] <NigeyS> Darkside, i think we have mattltm and whoever i rope in to taking me up there :)
[13:18] <Darkside> mm i hope the predictions will be OK for the weekend after..
[13:18] <jcoxon> rather it stayed nearly in radio range rather than off to the netherlands
[13:18] <jcoxon> NigeyS, you launching?
[13:18] <Darkside> else we'll have to call it off
[13:18] <NigeyS> jcoxon, 20th august from cam
[13:19] <edmoore> NigeyS: cusf or ears?
[13:19] <NigeyS> CUSF
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[13:19] <NigeyS> jonsowman, and Randomskk are in attendance iirc
[13:20] <edmoore> i'llcool
[13:20] <edmoore> whoops
[13:20] <edmoore> i might pop up for that
[13:20] <NigeyS> yey
[13:20] <jcoxon> nights - sadly can't come
[13:20] <edmoore> i haven't chased for a while
[13:20] <edmoore> it'll be fun to go on one
[13:21] <NigeyS> jcoxon, ah that sucks :(
[13:21] <NigeyS> edmoore, bring sunglasses, ats-1 is bright pink...
[13:21] <edmoore> good!
[13:21] <edmoore> the only thing that might get in the way is a house move
[13:21] <NigeyS> ouch
[13:21] <edmoore> i'm expecting to get in either this weekend or next
[13:21] <Darkside> edmoore: yessss
[13:21] <Darkside> i want to experience a british chase :P
[13:22] <NigeyS> jcoxon, how bad are the predictions for a pico ?
[13:22] <edmoore> we stop for tea a lot
[13:22] <edmoore> and usually go for a curry after
[13:22] <NigeyS> and scones :p
[13:22] <Darkside> haha
[13:22] <Darkside> awesome
[13:22] <NigeyS> hmm.. pub crawl chase....
[13:22] <edmoore> i go very very english is the payload has landed on someone's property
[13:22] <NigeyS> that'd be interesting
[13:22] <edmoore> 'oh good afternoon, how do you do?'
[13:22] <NigeyS> lol
[13:23] <jcoxon> bbl
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[13:23] <Darkside> i could use my accent on them
[13:23] <NigeyS> yeah, we can blame the aussie if anything gets damaged ;)
[13:23] <Darkside> "g'day mate, d'ya mind if we collect the balloon thats just landed in the field over there?'
[13:24] <edmoore> strooth
[13:25] <Darkside> strewth*
[13:25] <edmoore> oh it has a spelling and everything
[13:25] <edmoore> how quaint
[13:25] <Darkside> yep
[13:25] <NigeyS> heh
[13:30] <fsphil> another alarming pink payload?
[13:30] <NigeyS> yup yup
[13:30] <NigeyS> blame upu! lol
[13:35] <number10> lol
[13:42] <W0OTM> Hello World
[13:47] <fsphil> salut W0OTM
[13:49] <W0OTM> Howdy fsphil
[13:49] <W0OTM> did you see the url for my latest project?
[13:49] <fsphil> don't think I did
[13:49] <W0OTM> http://www.ihabproject.com/BallooMerang/
[13:49] <NigeyS> http://www.flickr.com/photos/pixel-eight/6024429000/
[13:49] <NigeyS> cuppa Tea? :p
[13:50] <Darkside> W0OTM: what autopilot are you using?
[13:52] <fsphil> NigeyS, one lump or two?
[13:52] <NigeyS> oo 2 pls lol
[13:53] Action: fsphil gets the baton
[13:53] <NigeyS> lol
[13:54] <Laurenceb_> W0OTM: what airframe are you using?
[13:55] <W0OTM> Using a Ardrino based autopilot
[13:55] <Darkside> oh ardupilot
[13:55] <W0OTM> No
[13:55] <Laurenceb_> fixed wing?
[13:56] <W0OTM> Laurenceb_: yes fixed wing
[13:56] <Darkside> and do you have ailerons :P
[13:56] <Laurenceb_> ah, not legal in the UK
[13:56] Action: Laurenceb_ has launched a rogallo wing from 11km
[13:56] <W0OTM> We are still flight testing several airfoils
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[13:57] <Darkside> W0OTM: full control then? elevators, rudder and ailerons?
[13:57] <Laurenceb_> id suggest full control
[13:57] <Darkside> or just rudder and elevator, like on most model aircraft
[13:57] <W0OTM> Darkside: yes
[13:57] <Darkside> cool
[13:57] <Laurenceb_> you can hit some bad turbulence up there
[13:57] <W0OTM> Darkside: 3 Channel
[13:57] <Darkside> thats why i never went any further with using my parkzone radian, as it only has rudder and elevators
[13:57] <Darkside> cool
[13:58] <Laurenceb_> my rogallo flew well but got hit by some bad turbulence even tho it was calmish weather
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[13:58] <Darkside> could put a little 23cm video transmitter on it, for when it gets closer to the ground
[13:58] <Darkside> sowhen its near landing, you can take over control and land it :D
[13:59] <Darkside> else you just make it fly in ever-lowering circles until it 'lands'
[13:59] <Laurenceb_> yeah i put a 35mhz receiver on the rogallo for that perpose
[13:59] <Darkside> cool
[13:59] <Darkside> heh, with enough power, you could probably control it when its a few km up :P
[13:59] <Laurenceb_> oh easily
[13:59] <Darkside> just need video downlink too
[14:00] <Laurenceb_> i enabled ground control at 2km altitude - the corona dsp receiver had at least that range
[14:00] <Darkside> ive got a 1W 23cm module that we're gonna fly on a balloon soon
[14:00] <Laurenceb_> nice
[14:00] <Darkside> will probably use some kind of helical antenna on the payload
[14:01] <Darkside> and loop yagis on ground
[14:06] <Darkside> hmm, gotta remember to go to maplins tonight
[14:06] <Darkside> need more battery holders
[14:08] <edmoore> dxf srawing software fore osx?
[14:08] <edmoore> drawing*
[14:08] <Darkside> good question
[14:14] <Laurenceb_> Darkside: as long as you dont petrol bomb it afterwards
[14:14] <Darkside> yep
[14:15] <Darkside> nothing has happened so far in bath
[14:18] <number10> I thought you were due a visit to london soon Darkside?
[14:18] <Darkside> yep
[14:18] <Darkside> saturday
[14:18] <number10> oh, hope they sort it out before then
[14:18] <Darkside> yeah
[14:19] <number10> what part of town was your accomodation?
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[14:19] <Darkside> baker street
[14:19] <Darkside> maryborough?
[14:20] <Darkside> marylebone
[14:20] <Darkside> thats the one
[14:20] <edmoore> Darkside: lol, i think path is probably going to be ok
[14:20] <edmoore> bath*
[14:20] <Darkside> right across the road from madame tussauds
[14:20] <Darkside> so i think my accomodation should be pretty safe
[14:21] <Laurenceb_> wax is pretty flammable
[14:21] <Darkside> heh
[14:21] <number10> should be ok there
[14:22] <Darkside> ohman
[14:22] <Darkside> http://en.wikipedia.org/wiki/Baker_Street_Robbery_(1971)
[14:22] <Darkside> awesome
[14:22] <Darkside> the bank job :-)
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[14:25] <number10> never caught the brains behind it
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[14:26] <fsphil> (ot: always love it when a website has a picture with a zoom button, which when clicked displayed a smaller version of the picture)
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[14:36] <fsphil> wow, radioworld have put up their carriage charges. £20 to post some SMA adaptors
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[14:39] <NigeyS> wtf :O
[14:40] <fsphil> must be an error, they've put the weight of the adaptor in wrong or something
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[15:12] <fsphil> hehe, the guy who deals with the lightning detectors is called Egon
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[15:51] <cuddykid> time to solder up the keychain cam!
[15:52] <cuddykid> &. take 2!
[15:53] <Laurenceb_> http://idle.slashdot.org/story/11/07/20/162212/Sheikh-Carves-His-Name-In-Desert-So-Its-Visible-From-Space
[15:53] <Laurenceb_> the hell
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[16:12] <cuddykid> woo, solder 2 wires successfully :)
[16:12] <cuddykid> despite somehow breaking it 1/2 way through it seems to work
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[17:22] <natrium42> yo jcoxon
[17:22] <jcoxon> hey natrium42
[17:22] <natrium42> how are you?
[17:22] <jcoxon> good thanks
[17:22] <jcoxon> you?
[17:22] <jcoxon> in california?
[17:22] <natrium42> yeah, going through interviews
[17:23] <jcoxon> success?
[17:23] <natrium42> still in the process, so no offers yet
[17:23] <jcoxon> do you have spacenear on your resume?
[17:24] <natrium42> no, though i mention ballooning as a hobby when interviewing
[17:24] <natrium42> oh, you should read this for laughs --> http://pastie.org/pastes/2342255/text?key=t2t5hafgqttlva1gc8vzjw
[17:24] <natrium42> email i got yesterday
[17:26] <jcoxon> :-)
[17:26] <fsphil> they need to talk to Mr Burns
[17:26] <natrium42> lol
[17:26] <MrCraig> jcoxon: I remember seeing an email thread about fixin a day some place in london? Is that going ahead and can I get in on it?
[17:26] <jcoxon> MrCraig, yes
[17:26] <jcoxon> 15 oct
[17:27] <fsphil> flights booked :)
[17:27] <jcoxon> currently i'm on nights - but i'll swap :-p
[17:27] <MrCraig> awesome fsphill I get to meet :)
[17:28] <fsphil> gonna be weird, I'll be referring to everyone by their nick
[17:28] <Upu> I booked hotel last night
[17:29] <Darkside> damn october..
[17:29] <Darkside> i won't be here :(
[17:29] <Darkside> can you bring it forward a month? :P
[17:29] <jcoxon> Darkside, web-based streaming event
[17:29] <fsphil> can't you accidently miss the plane?
[17:31] <Darkside> heh
[17:32] <Darkside> fsphil: but i'd have to stay an extra month and a half
[17:32] <Darkside> and thats a bit unrealistic
[17:32] <cuddykid> guys - how do I solder nichrome wire ?!
[17:35] <cuddykid> never mind - just done a google!
[17:36] <hibby> we didn't solder
[17:36] <hibby> we just wound it round some contacts
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[18:07] <cuddykid> done that now hibby :)
[18:08] <cuddykid> right.. cutdown made (out of garden wire!) - going to test now
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[18:41] <cuddykid> back from testing - cutdown device can't withstand over about 2kg - so will have to be redesigned using stronger material - however, cuts through cord in about 2 seconds
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[18:43] <SpeedEvil> :)
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[19:07] <Darkside> man, kettle chips are awesome
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[19:13] <stilldavid> Zuph: :(
[19:13] <stilldavid> w/r/t http://www.sparkfun.com/news/680#comment_44091
[19:26] <Zuph> stilldavid: :-p
[19:26] <stilldavid> Frencil is my boss, btw.
[19:28] <Zuph> Hope he was impressed with the balloon and the fire pony :)
[19:30] <Zuph> stilldavid: I was mostly being facetious. I hope no one takes it too seriously.
[19:31] <stilldavid> no, nobody did. it's hard to take comments posted in meme form seriously :)
[19:31] <Zuph> Good
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[20:29] <simhed> wow, someone just called me that they've found my payload lost over 7 weeks ago
[20:29] <Upu> grats :)
[20:29] <simhed> amazing, i can't believe it, thanks :)
[20:29] <fsphil> sweet!
[20:29] <SpeedEvil> simhed: Woo!
[20:30] Action: fsphil keeps the faith ;)
[20:30] <SpeedEvil> simhed: Where was this from - I forgot
[20:32] <simhed> it was launched in Poland
[20:32] <simhed> i thought it will travel ~15km
[20:32] <simhed> it travelled a whopping 115
[20:32] <SpeedEvil> Ah- that one.
[20:32] <SpeedEvil> I vaguely remember. :)
[20:32] <simhed> i'm launching the second one this Saturday
[20:33] <SpeedEvil> simhed: Did you have cameras onit?
[20:33] <simhed> good that i will have some data to adjust this mission
[20:33] <simhed> yeah, kodak zi6
[20:34] <Darkside> hopefully the camera will have survived
[20:34] <Darkside> or at least the memory card
[20:34] <simhed> yeah.. i'm slightly worried, it was somewhere in the field for that long
[20:34] <SpeedEvil> Memory cards are quite robust.
[20:35] <simhed> don't care about the cam, it was a cheap one, but keeping fingers crossed for SD
[20:36] <simhed> we'll see.. i'll let you know once i retrieve the payload :)
[20:36] Action: SpeedEvil crosses fingers.
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[20:42] <Lunar_Lander> hello
[20:43] <fsphil> hai
[20:45] <Lunar_Lander> how is life?
[20:48] <Hiena> High pitched on helium.
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[20:51] <Lunar_Lander> cool
[20:51] <Lunar_Lander> I wonder if breathing hydrogen would have the same effect
[20:51] <SpeedEvil> yes
[20:52] <SpeedEvil> But with more potential for comedy explosions.
[20:52] <Hiena> Btw, today, i done the with last successfull test with the sunflower oil fueled pulsejet experiment. Adding the extra glowplug based injector solved the the cold start problem.
[20:53] <SpeedEvil> Sounds like fun.
[20:53] Action: SpeedEvil has always wanted a pulsejet trombone.
[20:53] <Lunar_Lander> xD
[20:53] <Lunar_Lander> btw
[20:53] <Lunar_Lander> there is a manual I think on the EOSS site
[20:54] <Lunar_Lander> where they describe the dangers of pressurized gas, because someone alledgly breathed He out of the cylinder
[20:54] <Hiena> Sure, but still no budget even after the visit from the MIGs.
[20:54] <Lunar_Lander> he repeated it and then his lungs burst because he wasn't careful
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[20:58] <Hiena> Actually, kind of trippy when you expect a visit from the Men In Green, and you got a bunch of old fart with family and beach stuff. That's tooks the edge of the visit.
[20:59] <fsphil> someone died in NI earlier in the year from breathing too much He
[21:00] <Lunar_Lander> oh
[21:01] <Hiena> http://www.bbc.co.uk/news/uk-northern-ireland-11795984
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[21:06] <Lunar_Lander> yeah
[21:06] <Lunar_Lander> sad
[21:08] <eroomde> q
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[21:14] <Darkside> nn
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[21:19] <fsphil> oops.. I've lost an soic avr chip
[21:19] <fsphil> silly small things
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[21:24] <Randomskk> haha you think they are easy to lose, try 0201 resistors
[21:25] <Randomskk> you have to buy twice as many as you need :|
[21:25] <Lunar_Lander> btw
[21:25] <Lunar_Lander> I thought about trying to train soldering before going on to the other devices
[21:25] <Lunar_Lander> even with the new iron
[21:25] <Lunar_Lander> but I now read that soldering pins to breakouts and soldering protoboard are two different things
[21:27] <fsphil> Randomskk, that I don't doubt - got some bigger soic parts and they're already scary small
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[22:00] <Lunar_Lander> good nigh
[22:00] <Lunar_Lander> night
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[22:26] Action: K6HX could bring his to the meetup.
[22:28] <Laurenceb_> meetip?
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[22:50] <dadi> hi, is there anyone here responsible for the spacenear.us tracker?
[22:50] <jcoxon> i can help
[22:51] <dadi> Hi, you maybe remember us from last year. We launched a balloon from iceland. We are going to do it again tonight and were wondering if we could get the live predictor
[22:51] <Randomskk> are you set up to use the tracker system?
[22:51] <jcoxon> oh yes
[22:51] <jcoxon> i can do that
[22:52] <Randomskk> like, does dl-fldigi find your payload an?
[22:52] <jcoxon> hey dadi, we spoke about a iceland/uk launch
[22:52] <dadi> yes
[22:52] <dadi> ah yes
[22:52] <dadi> that died out I guess
[22:52] <jcoxon> which i'd still love to do
[22:52] <jcoxon> :-p
[22:52] <jcoxon> nah we'll do it one day
[22:53] <dadi> yes, I would to but all of us are moving to Denmark in a week
[22:53] <jcoxon> oh right
[22:53] <dadi> but we wanted to do one launch before
[22:53] <jcoxon> thats even better
[22:53] <jcoxon> we can launch from UK to denmark
[22:53] <jcoxon> :-p
[22:53] <jcoxon> okay
[22:53] <jcoxon> i'll set up the tracker
[22:53] <dadi> so we're gonna do that tonight
[22:53] <dadi> ok thanks
[22:53] <jcoxon> lat and lon of launch?
[22:54] <dadi> About 64°N, 21°W
[22:55] <jcoxon> okay grabbing data now
[22:55] <MrCraig> Does anyone know if delivery operators will launch cubesats into stable orbits?
[22:57] <K6HX> "stable" is a relative term. some have been up for years.
[22:58] <hibby> UKUBE is designed for 1 year use
[22:59] <hibby> most of our work @ strathclyde aerospace dept is going into accelerating the deorbit process and introducing some control
[23:02] <Laurenceb_> http://www.wombat.ie/gps/saoff.gif
[23:02] <Laurenceb_> nice
[23:02] <SpeedEvil> SA was nasty
[23:03] <MrCraig> I've been looking with early ticklings in my mind at Interorbitals Tubesat kits which include launch at a staggeringly low cost (granting for understandable restrictions). It puts launching a sat into the realm of possible for privately funded personal projects, but (sulking) it's a low decaying orbit with a three week to three month flight time. I'd be interested in a longer mission, closer to three years than three
[23:03] <jcoxon> dadi, what you all doing in denmark?
[23:03] <SpeedEvil> MrCraig: Solar panel that sticks out + pulsed plasma thruster.
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[23:03] <dadi> We are going to take a masters at the technical university
[23:03] <jcoxon> oh cool
[23:03] <jcoxon> okay predictions are running
[23:04] <dadi> yeah, great
[23:04] <MrCraig> SpeedEvil: forgive me being quite ileducated here but, that sounds so sci fi
[23:04] <dadi> thanks
[23:04] <jcoxon> how long before launch?
[23:04] <SpeedEvil> Pulsed plasma thruster = rod of teflon you draw an arc across.
[23:04] <Laurenceb_> its a little lame
[23:04] <SpeedEvil> And then the arc gets accellerated by the right hand rule
[23:05] <Laurenceb_> maybe colloidal thruster
[23:05] <SpeedEvil> Between a couple of electrodes
[23:05] <BrainDamage> fitting a motor with 1kg payload limit is not exactly easy
[23:05] <SpeedEvil> The nice plus is that it's utterly inert
[23:05] <dadi> we estimate launch around 3AM GMT
[23:05] <MrCraig> SpeedEvil: it's also very costly in terms of power right?
[23:05] <Laurenceb_> http://en.wikipedia.org/wiki/Colloid_thruster
[23:05] <dadi> gonna try to get pics of the sunrise
[23:05] <SpeedEvil> MrCraig: as with all ion thrusters, yes
[23:07] <jcoxon> dadi, cool
[23:07] <MrCraig> I'll have to do some research on these thrusters - including their own weight and effectiveness :)
[23:07] <jcoxon> though i'm not sure i'll be awake for it!
[23:08] <SpeedEvil> MrCraig: the thruster is really light.
[23:08] <SpeedEvil> MrCraig: The problem is the PMU ad the solar panel
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[23:11] <dadi> Hehe yes, I think we will have many cups of coffee to keep us going
[23:11] <MrCraig> SpeedEvil: *nods - well a PMU comes as part of the tubesat kit (which I'd expect to be easily modified) and it includes solar cells too. I'll do the math on the power consumption and effectiveness and see just how likely it is that the orbit could be sustained at least for a reasonable amount of time. If flight time can be reasonably extended, and I can add sufficient sensors to make the mission worth while, I'll ser
[23:12] <jcoxon> dadi, good trajectory
[23:13] <dadi> yeah, only around 15 km
[23:13] <SpeedEvil> MrCraig: err - no
[23:13] <dadi> last time it was 200 km
[23:13] <SpeedEvil> MrCraig: you need a 15kV or so power supply, with largish HV capacitor on the end
[23:14] <MrCraig> SpeedEvil: ok - that was a nice thought while it lasted.
[23:14] <MrCraig> lol
[23:14] <SpeedEvil> I don't mean the low voltage side of the supply
[23:14] <SpeedEvil> It depends.
[23:14] <SpeedEvil> It's become easier in some waysrecently, what with pezio transformers
[23:16] <MrCraig> It's sounding like the better option is a better launch
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[23:32] <NigeyS> hey dan
[23:32] <hibby> evenin' dan
[23:33] <NigeyS> oo hibsters alive, eyup !
[23:33] <hibby> hiya
[23:33] <hibby> whassup
[23:33] <NigeyS> watching the news
[23:33] <hibby> haha
[23:33] <hibby> im not in london, so it's fine
[23:33] <NigeyS> its in manchester and birmingham dude
[23:33] <NigeyS> londons quiet
[23:33] <hibby> im not there either
[23:33] <hibby> So I invoke the holy right of all Americans
[23:33] <hibby> "Not my problem"
[23:33] <hibby> :p
[23:34] <NigeyS> haha nice!
[23:34] <MrCraig> night all
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[23:34] <NigeyS> nn
[23:34] Action: hibby yawns
[23:34] Action: NigeyS gets a hammer
[23:35] <NigeyS> ftdi is locking up my com port for some bizarre reason
[23:36] <hibby> bad drivers
[23:36] <griffonbot> Received email: James Coxon "[UKHAS] Icelandic Launch - tonight @ ~ 0300GMT"
[23:36] <NigeyS> 3am...wtf
[23:37] <SpeedEvil> They're wierd in iceland.
[23:37] <NigeyS> lol
[23:37] <NigeyS> you staying up for it jcoxon ? :p
[23:38] <jcoxon> well...
[23:38] <jcoxon> prob not
[23:38] <jcoxon> though i'm shifting onto a night shift so the longer i stay up the better
[23:38] <NigeyS> thats 4am bst right ?
[23:38] <jcoxon> yeah
[23:38] <jcoxon> actually no chance i'll be up then
[23:39] <NigeyS> lol dont blame ya
[23:39] <NigeyS> might stay up, not sure, got to be out at 11am :|
[23:39] <jcoxon> though i'm sure an iceleandic launch would be soo fun
[23:39] <NigeyS> be bloody cold though!
[23:39] <hibby> hmm
[23:40] <hibby> "A bug affecting Chrome 13 on Windows prevents Surplus from fully working. Because of this, Surplus Lite has been automatically enabled and some features may not be availiable" ... I'm not on windows...
[23:40] <jcoxon> hi K6HX, welcome to #highaltitude
[23:41] <hibby> lol
[23:45] <K6HX> hey jcoxon.
[23:46] Action: K6HX just found out about this channel, and though that he might lurk a bit and see wussup.
[23:46] <jcoxon> its a good one to lurk on
[23:46] <SpeedEvil> Balloons, usually.
[23:46] <jcoxon> interesting conversation
[23:47] <K6HX> i've been wanting to do a balloon launch for a long time.
[23:47] <jcoxon> your blog is awesome - really useful - i borrowed some of your CW code i think
[23:48] <NigeyS> SpeedEvil, lol :p
[23:48] <K6HX> golly. I must be famous!
[23:48] <K6HX> :-)
[23:49] <hibby> hehe
[23:50] Action: K6HX forgets that his blog is read by maybe two or three people a day!
[23:50] <NigeyS> hrm odd
[23:50] <jcoxon> i seem to remember it was about encoding CW chars as binary
[23:51] <K6HX> that does sound like one of mine.
[23:51] <jcoxon> 1 and 0 represent dit and dat
[23:51] <jcoxon> so then i applied this to hellschreiber
[23:51] <jcoxon> using 1 and 0 to represent black and white
[23:51] <hibby> it is an interesting blog.
[23:51] <K6HX> are you doing hellschreiber on a balloon beacon?
[23:52] <jcoxon> yeah i've used it a few times as a backup beacon
[23:52] <jcoxon> with a completely isolated system
[23:52] <jcoxon> the main flight computer using rtty for downlink
[23:52] <K6HX> cool. I like hellschreiber, for reasons that aren't entirely obvious to me. :-)
[23:53] <jcoxon> oh its awesome receiving it
[23:53] <jcoxon> i think the fun is the fact that you need to interpret it
[23:53] <jcoxon> and its such a delightfully simple concept
[23:53] <K6HX> i was pondering making a portable feldhell system that used a dspic to generate/receiver hellschrieber.
[23:54] <K6HX> still think it would be fun to do.
[23:54] <jcoxon> :-)
[23:54] <K6HX> do you have a blog?
[23:54] <jcoxon> i don't
[23:54] <jcoxon> but i do have a wiki of balloon launches
[23:55] <K6HX> ah. link?
[23:55] <jcoxon> http://www.pegasushabproject.org.uk/wiki/doku.php
[23:55] <jcoxon> but perhaps the best link to check out is http://wiki.ukhas.org.uk/
[23:55] <K6HX> you are in the UK? I thought you guys had a tough time with regulations on balloon launches...
[23:55] <jcoxon> we do
[23:55] <jcoxon> we get round them
[23:55] <jcoxon> so we only use low power
[23:55] <jcoxon> so max is 10mW
[23:56] <K6HX> cool!
[23:56] Action: K6HX appreciates low power modes.
[23:56] <jcoxon> oh yeah
[23:56] <jcoxon> max range is 555km currently
[23:57] <hibby> jcoxon: I'm going to beat that when I'm back home ;)
[23:57] <K6HX> I've experimented with QRSS and WSPR a bit. Not too much recently though.
[23:57] <jcoxon> hehe - go for it
[23:58] <hibby> out satellite station should be far more sensitive than that
[23:58] <K6HX> jcoxon: what band?
[23:58] <jcoxon> 70cm
[23:58] Action: K6HX nods.
[23:58] <hibby> K6HX: I remember your blog... I liked your bit on Hamnation - it's something one sees an awful lot around the community.
[23:59] <NigeyS> jcoxon, are nss pins defined in any order? i.e 5,6 would be rx,tx ?
[23:59] <K6HX> i think ham radio needs new blood, but we get it by doing cool stuff, not by telling people how easy and wonderful it is.
[00:00] --- Wed Aug 10 2011